我在这里不知所措，希望有人可以提供帮助。我对一般的框架非常陌生，更不用说CakePHP了，但我想我可以在这个问题之后解决这个问题。这似乎是一个非常简单的配置问题，但我不知道我哪里可能出错。对于术语失误道歉，我还在学习。好的，设置：
从带有PHP 7.0.20-1~dotdeb+8.2的干净debian 8系统开始，我按照CakePHP安装说明进行操作。 composer一切顺利。我遵循bookmark tutorial app的教程项目，一切都很好。我安装了FriendsOfCake的crud包，再次，一切都很好，数据库交互很好，crud操作成功。
我还添加了crud-view BootstrapUI和Search，并开始按照crud-view说明将其转换为启用了引导程序的ui。这就是问题发生的地方。在src/Controller/AppController.php文件中，我去添加安装说明要添加的代码。在故障排除方面，我一次一行地完成这个过程，看看我是否可以确定问题发生的位置（我知道这不是框架最合乎逻辑的方式，但我老了）。将loadComponent行添加到initialize()函数不会产生任何问题。当我将if语句模糊添加到beforeRender回调时，就会出现问题。这是我的AppController.php文件的内容：
<?php
/**
* CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
* Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
*
* Licensed under The MIT License
* For full copyright and license information, please see the LICENSE.txt
* Redistributions of files must retain the above copyright notice.
*
* @copyright Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
* @link http://cakephp.org CakePHP(tm) Project
* @since 0.2.9
* @license http://www.opensource.org/licenses/mit-license.php MIT License
*/
namespace App\Controller;
use Cake\Controller\Controller;
use Cake\Event\Event;
/**
* Application Controller
*
* Add your application-wide methods in the class below, your controllers
* will inherit them.
*
* @link http://book.cakephp.org/3.0/en/controllers.html#the-app-controller
*/
class AppController extends Controller
{
/**
* Initialization hook method.
*
* Use this method to add common initialization code like loading components.
*
* e.g. `$this->loadComponent('Security');`
*
* @return void
*/
public function initialize()
{
parent::initialize();
$this->loadComponent('RequestHandler');
$this->loadComponent('Flash');
$this->loadComponent('Crud.Crud', [
'actions' => [
'Crud.Index',
'Crud.View',
'Crud.Add',
'Crud.Edit',
'Crud.Delete',
'Crud.Lookup',
],
'listeners' => [
// New listeners that need to be added:
'CrudView.View',
'Crud.Redirect',
'Crud.RelatedModels',
// If you need searching. Generally it's better to load these
// only in the controller for which you need searching.
'Crud.Search',
'CrudView.ViewSearch',
]
]);
/*
* Enable the following components for recommended CakePHP security settings.
* see http://book.cakephp.org/3.0/en/controllers/components/security.html
*/
//$this->loadComponent('Security');
//$this->loadComponent('Csrf');
}
/**
* Before render callback.
*
* @param \Cake\Event\Event $event The beforeRender event.
* @return \Cake\Network\Response|null|void
*/
public function beforeRender(Event $event)
{
if (!array_key_exists('_serialize', $this->viewVars) &&
in_array($this->response->type(), ['application/json', 'application/xml'])
) {
$this->set('_serialize', true);
}
if ($this->viewBuilder()->className() === null) {
$this->viewBuilder()->className('CrudView\View\CrudView');
}
}
}
最后一个if语句会导致破坏，因为它似乎是在crud-view中使用的东西。由于说明有点不清楚，我尝试使用和不使用上面的模糊操作响应中的类型。我认为那不是问题所在。当我进入页面时，我看到了这一点：
Notice (8): Undefined variable: siteTitle [ROOT/vendor/friendsofcake/crud-view/src/Template/Layout/default.ctp, line 24]
Notice (8): Undefined variable: disableSidebar [ROOT/vendor/friendsofcake/crud-view/src/Template/Layout/default.ctp, line 42]
Notice (8): Undefined variable: sidebarNavigation [ROOT/vendor/friendsofcake/crud-view/src/Template/Element/sidebar.ctp, line 2]
Notice (8): Undefined variable: sidebarNavigation [ROOT/vendor/friendsofcake/crud-view/src/Template/Element/sidebar.ctp, line 10]
Notice (8): Undefined variable: actionConfig [ROOT/vendor/friendsofcake/crud-view/src/Template/Element/sidebar.ctp, line 12]
Invalid data type, must be an array or \ArrayAccess instance. InvalidArgumentException
Documentation API
If you want to customize this error message, create src/Template/Error/error500.ctp
toggle vendor stack frames
⟩ Cake\Utility\Hash::get ROOT/vendor/friendsofcake/crud-view/src/Template/Element/sidebar.ctp, line 12
⟩ include CORE/src/View/View.php, line 1025
⟩ Cake\View\View->_evaluate CORE/src/View/View.php, line 986
⟩ Cake\View\View->_render CORE/src/View/View.php, line 1372
⟩ Cake\View\View->_renderElement CORE/src/View/View.php, line 513
⟩ Cake\View\View->element ROOT/vendor/friendsofcake/crud-view/src/Template/Layout/default.ctp, line 51
⟩ include CORE/src/View/View.php, line 1025
⟩ Cake\View\View->_evaluate CORE/src/View/View.php, line 986
⟩ Cake\View\View->_render CORE/src/View/View.php, line 657
⟩ Cake\View\View->renderLayout CORE/src/View/View.php, line 615
⟩ Cake\View\View->render CORE/src/Controller/Controller.php, line 623
⟩ Cake\Controller\Controller->render CORE/src/Http/ActionDispatcher.php, line 125
⟩ Cake\Http\ActionDispatcher->_invoke CORE/src/Http/ActionDispatcher.php, line 93
⟩ Cake\Http\ActionDispatcher->dispatch CORE/src/Http/BaseApplication.php, line 78
⟩ Cake\Http\BaseApplication->__invoke CORE/src/Http/Runner.php, line 65
⟩ Cake\Http\Runner->__invoke CORE/src/Routing/Middleware/RoutingMiddleware.php, line 59
⟩ Cake\Routing\Middleware\RoutingMiddleware->__invoke CORE/src/Http/Runner.php, line 65
⟩ Cake\Http\Runner->__invoke CORE/src/Routing/Middleware/AssetMiddleware.php, line 88
⟩ Cake\Routing\Middleware\AssetMiddleware->__invoke CORE/src/Http/Runner.php, line 65
⟩ Cake\Http\Runner->__invoke CORE/src/Error/Middleware/ErrorHandlerMiddleware.php, line 92
⟩ Cake\Error\Middleware\ErrorHandlerMiddleware->__invoke CORE/src/Http/Runner.php, line 65
⟩ Cake\Http\Runner->__invoke CORE/src/Http/Runner.php, line 51
⟩ Cake\Http\Runner->run CORE/src/Http/Server.php, line 80
⟩ Cake\Http\Server->run ROOT/webroot/index.php, line 37
依此类推。看起来我错过了一些非常非常简单的东西，但是例如在siteTitle变量之后尝试追溯代码会花费我很多时间。我希望有人可以看一眼这个并且去“哦，你没有在这个文件中抛出这个简单的变量”。非常感谢，感谢让我知道这个问题在哪里出错了。